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Service bulletin 19TS-4REV

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10166782
Published by NHTSA2019-10-28
Manufacturer's number19TS-4REV
Manufacturer's date2019-10-28
NHTSA componentENGINE AND ENGINE COOLING

NHTSA's summary

Technical Service Letter Revision on heavy duty coolant oil module and oil filter change. Older modules will not be compatible with newer module.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Engine

Vehicles listed
FCCC S2G2020
FCCC S2RV2020
FCCC XBP2020
FCCC XCM2020
FCCC XCR2020
FREIGHTLINER 108SD2020
FREIGHTLINER 114SD2020
FREIGHTLINER 122SD2020
FREIGHTLINER BUSINESS CLASS M22020
FREIGHTLINER CASCADIA2020
FREIGHTLINER CORONADO2020
THOMAS BUILT BUSES SAF-T-LINER C22020
WESTERN STAR 47002020
WESTERN STAR 48002020
WESTERN STAR 49002020
WESTERN STAR 57002020
WESTERN STAR 69002020

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
20204082020-09-01. Engine
20V5270002020-09-01. ELECTRICAL SYSTEM:WIRING; ENGINE AND ENGINE COOLING

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
FleetCom_Heater Core2026-01-08. Other. Fleet Communications for Heater Core Plugging
FleetCom_SS 3163-FTL2025-12-06. Other. Fleet Communications for Power Steering Reservoir Fill Cap Venting
FleetCom_Low Coolant2025-12-05. Other. Fleet Communications for Low Coolant Sensor
CXA_10_25_Low Coolant2025-11-05. Other. CX Advocate for P4, WST X-Series, DD Engines Low/Critical Low Coolant Warnings
CXA_10_25_Conmet Oil Pan2025-11-05. Other. CX Advocate for ConMet Oil Pan Insert Additional Issues
CXA 3_25_NOx2025-04-02. Other. CX Advocate for NOx conversion low faults
CXA 2_25_Turbo Oil Drain2025-03-04. Other. CX Advocate for turbo oil drain cracking
CXA 2_25_NOx2025-03-04. Other. CX Advocate for NOx conversion low faults
MYCOM_02102025-12025-03-04. Other. My Communications for Variable Speed Coolant Pump for DD13 Engines - Cascadia/57X Only
TSB01-001-DDC2025-03-04. Service bulletin. Technical Service Bulletin for GHG17 and Newer DD Platform Heavy Duty Oil Pan Drain Plug Inserts